Chris was stationary about 180 miles south-southeast of Cape Hatteras, N.C. with maximum sustained winds of 50 mph, according to the NHC 5 p.m. EDT advisory. It was centered 60 miles (95 kilometers) east of Martinique and was racing west-northwestward at 26 mph (43 kph).
As the storm is positioned over very warm ocean waters, it is forecast to steadily strengthen over the next 72 hours and become a hurricane between Tuesday and Wednesday.
Dominica and Guadeloupe remain on tropical storm warning while Martinique, St Martin, St Barthelemy, Saba, St Eustatius and St Maarten are on tropical storm watch.
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The Tropical Storm Watch for Barbados has therefore been discontinued.
However, a small craft warning remains in effect for Barbados until 6a.m. Monday.
But the National Weather Service said Beryl remained on track to move south of the U.S. Virgin Islands and across western Puerto Rico on Monday, potentially bringing 2 to 3 inches (5-8 cm) of rain and gusty winds to the U.S. territory still recovering from the devastation wrought past year by Hurricane Maria. They predict Beryl will continue to weaken over the next 24 hours, but said the storm may develop into a tropical cyclone in a few days as it moves across the Bahamas and the western Atlantic.
Chris was upgraded from a tropical depression to a tropical storm on Sunday.
Forecasters say the storm's remnants are expected to produce 2 to 3 inches (5 to 8 centimeters) of rain, with up to 5 inches (13 centimeters) in isolated areas.